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How much water does a running toilet use per hour?

September 8, 2021

Mitchel Plumbing Gas

How much water does a running toilet use per hour?


If you're like most people, you probably don't think too much about your toilet.

But what if your toilet was running constantly and wasting water? or do we even know how much water is used in every flush? You'd probably start to pay more attention to it then!

Fortunately, most toilets only run intermittently, but if yours is one of the few that runs constantly, you may be wondering just how much water it's using up.

Keep reading to find out!

Is it normal for a toilet to run intermittently?

It is actually quite normal for toilets to run intermittently. It means that the toilet is refilling the bowl with water after each flush. This usually happens because the float arm or flapper valve gets stuck in the "open" position, allowing water to constantly flow into the bowl.  


While it may be annoying to have a toilet that runs intermittently, it's actually not doing too much harm. However, if your toilet is running constantly, it could be wasting a lot of water.

What causes toilet to run randomly?

The most common cause of a toilet running randomly is that the float arm or flapper valve gets stuck in the "open" position, allowing water to constantly flow into the bowl. This usually happens because of a build-up of mineral deposits, which can be caused by hard water.  


Another possible cause of a toilet running randomly is a leak in the supply line. This can be caused by a loose connection or a crack in the line. If you suspect that your toilet is leaking, you can check the water level in the tank. If it's higher than usual, it's likely that there's a leak.

What happens if toilet keeps running?

If your toilet keeps running, it means that water is constantly being flushed into the bowl. This can be caused by a number of things, including a float arm or flapper valve that's stuck in the "open" position, a leak in the supply line, or a problem with the fill valve.


If your toilet keeps running, it's a good idea to call a plumber to take a look at it. They'll be able to diagnose the problem and make the necessary repairs.

Does a running toilet use more water?

A running toilet uses more water than a toilet that doesn't run because water is constantly being flushed into the bowl. This can waste a lot of water over time, so it's important to fix the problem as soon as possible.

Does flushing toilet cost money?

No, flushing the toilet doesn't cost money. However, if your toilet is running constantly, it could be wasting a lot of water. This can increase your water bill, so it's important to fix the problem as soon as possible.


The water that fills the tank and bowl after flushing comes from the main water supply. So you will be using tap water in your home. A smart way to save water is to install a rainwater tank and use that water to fill your toilet cistern. A rainwater tank could be used for gardening, car washes and other outdoor activities too.


You could also use grey water but that would require some plumbing changes. Grey water is water that has been used in your home for activities like showering, laundry and dishwashing. This water can be reused to flush the toilet.

Does a slow filling toilet waste water?

A slow-filling toilet doesn't waste water because the water is only being flushed into the bowl when it's needed. However, if your toilet is running constantly, it could be wasting a lot of water.


If you think your toilet is running constantly, it's a good idea to call a plumber to take a look at it. They'll be able to diagnose the problem and make the necessary repairs.

How much water does a toilet use per flush in litres?

The average toilet uses about 9 litres of water per flush. However, some newer toilets use less water, and some older toilets use more. Standard Australian toilets are required to use no more than 9 litres per flush.

How much water does a running toilet use in one day?

A running toilet could use about 216 litres of water per hour! That means it could use about 5,184 litres of water in one day. This is equivalent to about 30 buckets of water.  In comparison, a standard toilet uses about 9 litres of water per flush. So if you flushed the toilet six times a day, you would use about 54 litres of water.


If your toilet is running, it's a good idea to call a plumber to take a look at it. If you think about the costs of water bills and the costs of repairs, it's worth it to fix the problem as soon as possible.

Wrap up

A running toilet can use a lot of water, so it's important to fix the problem as soon as possible. There are a number of things that can cause a toilet to run, including a float arm or flapper valve that's stuck in the "open" position, a leak in the supply line, or a problem with the fill valve.


If you think your toilet is running constantly, it's a good idea to call a plumber to take a look at it. They'll be able to diagnose the problem and make the necessary repairs. In some cases, you could fix it as mentioned but if it is more serious, it is best to leave it to the professionals.

A broken or cracked bowel or leaky cistern could cause serious water damage so it is best to be safe!


We hope you found this article helpful. If you have any further questions, please don't hesitate to contact us at Mitchell Plumbing and Gas! We cover Brisbane and greater areas and would be happy to help you with your plumbing needs.


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